description and elevation

...generally between 16,500 and 19,500 feet (5,000 and 6,000 metres). Most of the higher summits are extinct volcanoes, such as the Llullaillaco, 22,109 feet; Licancábur, 19,409 feet; and Ojos del Salado, 22,614 feet. After the last glaciation the melting waters collected in shallow lakes in the intermediate elevated basins. Today these salt lake basins (...

physiography of the Nazca Plate

...most of the west coast of South America at a rapid rate of 80 to 100 millimetres per year. A nearly continuous chain of volcanoes lines the margin of South America, and the world’s tallest volcano, Ojos del Salado (6,893 metres), is one of these peaks. The Andean range, however, is more than just a chain of volcanoes, and its highest peak, Mount Aconcagua (6,959 metres), the tallest outside...